The signature field won't be interactive in Reader on iOS device using Reader.
You may use "Fill and Sign" or Send for signature or Adobe sign: Acrobat Reader Help for iOS: Creating Signatures and Signing
Let us know if that helps.
Thank you for your assistance. In the Adobe IOS app there is the function to add a signature. The issue is now that the signature made by our customer is placed in the middle of the document and it's really big. For now I scale it down and move the signature to the appropiate field.
What I would like is that the signature is automatically placed in the correct field and that the size is not bigger than the field.
Fill and sign is not a solution, because all the "fields" are not shown and therefore not fillable.
The signature should be in the bottom left of the PDF:
your help is much appreciated.
It seems that you are using "Create signature" option under Comments to add the signature to PDF.
When you add the signature to PDF using the create signature option, you can resize it and move it.
To move signature, long press the signature and move it to the location you want to put it.
To resize, just tap on signature and move the corner handles.
However, it can not be done automatically.